Cities worldwide are not just growing, but also trying to reconfigure themselves for a sustainable future, with higher quality of life for every citizen. That means capitalizing on renewable power sources, maximizing energy efficiency and scaling up electrified transport on an unprecedented scale. The 2015 Paris Agreement called for limiting the rise in average global temperatures to 1.5oC compared to pre-industrial levels, implying a massive reduction of greenhouse gas (GHG) emissions. Meeting the ambitious climate goal would require a near-total elimination of emissions from power generation, industry, and transport by 2050, said Ariel Liebman, Director of Monash Energy Institute, at a recent AI for Good webinar convened by an ITU Focus Group studying AI and environmental efficiency. Renewable energy sources, including the sun, wind, biofuels and renewable-based hydrogen, make net-zero emissions theoretically possible.